| 摘要 |
PURPOSE:To effectively prevent the breakage of a plate in a winding process by arranging zigzag punched holes each of which has the line of apsides in the direction intersecting the winding direction of a plate. CONSTITUTION:In a cylindrical battery assembled by spirally winding a cathode plate 1 and an anode plate 2 through a separator 3, a punched metal 10 is used as a conductive core of each of the plates 1, 2. Each punched hole 11 in the punched metal 10 is formed in the shape of slots which has the line of apsides in the direction intersecting to the winding direction (a) of the plate, and the punched holes 11 are arranged in zigzag. Tensile stress in a winding process is moderated by easy deformation of the punched holes 11, and the breakage of the core is effectively prevented. The core material is made thin, the opening rate of holes is increased, the core volume is decreased, and the amount of active material is increased. As a result, the energy density of the plate can be increased. |
